US1722393A - Electrical device - Google Patents

Description

July 3o, 1929. A. H. POST Er AL ELECTRICAL BAE-VI CE Filed Dec. 13, 1926 Patented July 39, 1929.

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.ALBERT H. POST, OF VATERB'RY, CONNECTICUT, AND SWAN AUGUST SWANSON, NEVI YORK, N. Y., ASSIGNORS TO HENRY HYMAN, OF BROOKLYN, NEV YORK.

'ELECTRICAL DEVICE.

Application filed December 13, 1926. Serial No. 154,339.

Our invention relates to an electric lamp socket and the switch for controlling the same, but the switch is not limited to and may be used independently of the lamp socket. An object of our invention is to make a switch of few parts and of unusual simplicity of construction, resulting in a less expensive product and one less likely to get out oforder. Other objects of our invention and features of novelty will appear from the following description taken in connection with the accompanying drawings, in which Fig. 1 is an elevation of the lamp socket with the casing broken away to show the lamp mounting;

Fig. 2 is a section on the line 2-2 of Fig. 1, showing the switch open; l

Fig. 3 is a section on the line 3-3 of Fig. 2, showing the switch closed; and

Fig. 4 is a mid-section through the switch at the contact carrier or switch button.

Like reference characters indicate like parts in the several views. Y

A. metallic casing 10 of the usual forni has an extension 11 on the cap 12 by which it may be fastened to any electric light fixture by the usual threaded connection and be secured in place by a set screw 13. An insulating lining 15 separates the body of the casing from the switch member and an inner lining 16 protects the cap portion 12 of the casing 10.

A single or unitary porcelain block y18 acts as a base or mounting for the'entire switch structure. This block 18 is recessed at 19 and 2O to carry the terminal posts 21 and 22 with their binding screws 23 and 24. The terminal post 21 and a threaded lamp socket 26 are held to the porcelain block by a bolt 25 passing through both the socket 26 and the y block 18 and threaded into the arm of the terminal post 21. vThis bolt 25 provides an electrical path directly from the terminal post 21 to the lamp socket 26. A second holt 27 fastens the lamp socket directly to the block 18.

A sunken cavity 28 in oneend of the porcelain block 18 carries a flat switch or contact plate 29 of metal preferably stamped out to the desired form. Preferably all parts of the stamped plate lie in a single plane. That is to say1 the plate is stamped from a vflat sheet of suitable metal. This plate is secured to the block 18 by a bolt 30 passing through the plate and threaded intov the post 22. The

head of the bolt 30 engages the plate 29 to make electrical cont-act therewith and the stem of the bolt connects it electrically to the terminal post 22. The switch plate is of a tough resilient metal and is secured at the one point by the bolt 30. The plate 29 has a tip 31 which moves to make the electrical contact and has an extensive range of elastic movement. The opposite extremity 32 of the plate retains the switch actuating member in operative position.

A slot 33 in the block 18 accommodates the rod or spindle 34 connecting the switch button 35 and the switch member 36. The spinf dle 34 is rotatably mounted in a groove 37 communicating with the cavity 28 in the block and with a cavity 38 in which the switch 36 rotates. The actuating button 35 is of vulcanite and rotates its metallic spindle or rod 34 within the casing.

The rectangular switch contact member 36 is mounted on the spindle 34 in the usual manner with a little free motion to permit a quicker movement in the opening or closing of the switch. I

The cavity 28 in the porcelain block is covered at its outer extremity by an approximately circular sheet of stiff insulating mate-` rial 39. This is perforated for the passage of the bolts 25 and 27 which retain the lamp socket 26 against the plate 39. This plate 39 is perforated for the passage of an electrical contact member 41 extending on both sides of the plate. This is secured to the plate by an eyelet 42 located approximately centrally of the insulating plate 39.l The inner extremity 41 of the contact member engages the plate 29, while the outer extremity engages the lamp in the socket 26.

In operation, the control button 35 moves the switch member 36' against the switch plate 29. The plate 29 is pressed against the contact member 41. This makes an electrical path from the terminal 22 through the boltf30, the plate 29, the contact member '41, to the center point of a lamp inserted in the socket 26. From the lamp the path of the current extends fromthe socket 26 to the terminal 21 through the bolt 25.

Our invention provides a lamp socket and a switch of exceptional simplicity as it does away with a number of the parts used in earlier sockets. This results in a reduction in the cost of manufacture and provides a switch with a long period of useful life.

Changes may be made in the detai1 features or our invention without departing` from the invention as covered in the claims.

We claim:

l. A lamp switch comprising a base, a terminal on one side there, a switch member on the other rside thereof, a bolt passing through one end of said member and connecting it to the base and to said terminal, a contact disposed adjacent the other end of said member, and means to bring said member' into engagement with said Contact.

2. A lamp switch comprising a base, a switch actuating stem disposed in a recess in said base, a switch member holding said stem in said recess, means on said stem to actnate said member, a terminal member and a single bolt fastened through said switch member and said terminal, and securing them in place. o

3. A lamp switch comprising,` a base, a lamp socket secured to said base, an insulating plate disposed between the basey and the socket, a contact member extending through said plate and having contacts disposed on opposite sides of said plate, and means securing said member to said plate'. Y

ALBERT H. POST.

SWAN AUGUST SWANSON.

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